I can't pin down what change caused this, but I recently switched to ZSH on OSX. Shouldn't matter, I don't think, but I've included it in case it's relevant.

All of a sudden, when I start ST2, after a couple of minutes I get a beach ball. Sometimes it's intermittent for the first few minutes, but it always eventually becomes permanent and I have to force close. ST2 is completely unusable.

I haven't tried a reinstall yet, because I'm hoping to get some advice here as to how deeply I should try to scrub it before reinstalling.